Drift-pin for drilling-machines.



Patented Feb.A Il, |902.

F. MUENGER.

No. 693,049.A

lrllwnr FREDRICK MUENGER, OF I-IILL CITY, SOUTH DAKOTA, ASSIGNOR OF ONE- IIALF TO CAMILLO VON IVOEIIRMANN, KOF HILL CITY, SOUTH DAKOTA.

DRIFT-PIN FOR DRlLLlNG-MACHINES.

SPECIFIGATION forming part of Letters Patent No. 693,049, dated February 1 1, 1902.

Application tiled October 16.1901. Serial No. '781887. (No model.l

To @ZZ whom, it may concern:

Beit known that I, FREDRICK MUENGER, of Hill City, in the county of Pennington and State of South Dakota, have invented certain new and useful Improvements in Drift-Pins for Drilling-Machines; and I hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, which form part of this specification.

This invention is au improved drift-pin or drift-block for drilling-machines. Driftpins are used to facilitate the removal of the steel bushings from the spindles or sockets of the drilling-machine and avoid battering of the drills and of the ends of the bushing.

The invention therefore consists in the novel construction of the drift-pin, as hereinafter described with reference to the accompanying drawings and summarized in the claims following such description.

In said drawings, Figure l is a transverse longitudinal section through the socket or spindle head of a drilling-machine, illustrating the construction and arrangement of the drift-pin for use therein. Fig. 2 is a top plan view of Fig. l with the covering-plate removed. Fig. 3 is a detail perspective view of the drift-pin and its casing detached from the socket.

In said drawings, A represents an ordinary spindle or socket of a drilling-machine of any suitable construction, which is attached to the operating mechanism and is provided with an opening a, preferably covered by a removable plate B, which may be secured by screws Z).

C is a cylindrical bushing which is tightly fitted in the drill-holding end of the spindle. This bushing is adapted to receive and hold the shank of the drill-tool F. This bushing holds the drill properly in place and connects it to the spindle; but when the bushing wears so that the drill does not act properly it becomes necessary to remove it, and my presentI invention provides a drift pin or block which is used to remove the worn bushing.

The drift-pin D is substantially cylindrical, but is provided with an enlarged semicircular rib D' on its upper side about midway of its length. The part d of the drift-pin, which is adapted to engage the bushing, is cylindrical. The opposite part ofthe drift-pin is flattened on top, as at d', so as to facilitate the introduction of a tool T against the rib D' to force the drift-pin outward after it has been inserted in the spindle through the opening a2. When the drift-pin is driven outwardly, it 'ejects the bushing, which is tightly fitted in the casing, as indicated in Fig. l. The extremity of part d of the driftpin is preferably beveled on its upper edge,

as indicated at d2, to facilitate the insertion y of the drift-pin in the casing or its removal therefrom.

The bushing C is driven into the socket or spindle A, and the drill F is engaged therewith. The bushing wears rapidly, so it has to be frequently renewed; but it becomes very tightly wedged in the spindle. `When it is desired to remove a worn bushing, the plate B is removed and the drift-pin D placed in the spindle, as shown in Fig. l. Atool T can be placed against the collar D of the pusher and the latter driven down so as to force the bushing C out of the casing and permit a new bushing to be placed therein without hammering or battering the ends of the bushing or the casing or socket.

Having thus described my invention, what I therefore claim as new, and desire to secure by Letters Patent thereon, is-

l. The herein-described drift-pin for re` moving bushings from drill spindles or sock= ets, having one end portion cylindrical and adapted to engage the bushing when inserted in the spindle and its other 'end portion flattened, and provided with a projecting trans verse rib on its side intermediate its end porA tions by which it can be driven, for the pura pose and substantially as described.

2. The combination of the spindle having a slot, and a removable bushing in the spindle; with a removable drift-pin adapted to be inserted in the spindle through the slot having a projecting transverse rib or flange on one side, and one end adapted to engage the bushing and its other end beveled on its upper side, for the purpose and substantially as described.

3. The combination of the drill spindle or socket having an opening, and a removable ICO l adapted to be placed in Said spindle having bushing in said socket; with a drift-pin of the spindle and having one end beveled, and acover for the opening inthe socket, all a central projecting rib on one side, and havsubstantially as described.

ing one end part cylindrical and its other In testimony that I claim the foregoing as end part Hattened, substantially as described. l my own I affix my signature in presence of two 15 4. The combination of the drill spindle or witnesses. socket having an opening, and a removable FREDRICK MUENGER. cylindrical bushing insaid socket Wi th a cy- Vitnesses: lindrical drift-pin having a central parti-cy- ALBERT CARR, lo lindrical rib projecting through the opening l C. C. GRIM. 

